The generator matrix

 1  0  0  0  1  1  1  1  4  1  1  0  6  1  0  1  6  6  2  1  1  1  1  4  1  0  1  6  1  1  1  1  2  6  1  6  1  0  1  1  0  1  0  1  0  6  1  0  2  1  1  1  1  2  1  4  1  1  2  1  4  1  0  1  4  1  2  1  2  1  2  1  0  1  6  1  1  1  6  1
 0  1  0  0  0  0  1  3  1  5  4  1  1  7  2  6  1  1  6  6  3  7  0  1  7  1  5  0  0  2  7  6  4  6  5  1  3  1  4  4  1  2  6  2  1  1  6  4  1  3  5  5  1  0  3  1  6  6  1  2  1  4  1  6  6  7  1  7  1  2  4  1  4  3  1  7  2  7  2  0
 0  0  1  0  0  1  0  3  3  5  7  2  7  4  1  6  2  6  0  1  6  3  4  5  6  7  3  1  1  2  3  5  1  1  0  4  0  0  1  4  1  5  4  4  7  6  1  1  1  2  4  1  7  1  1  6  3  6  5  3  2  2  4  7  1  4  3  2  3  6  1  5  1  5  5  6  6  1  1  0
 0  0  0  1  1  3  7  5  6  4  4  5  3  0  5  6  1  0  1  3  7  2  3  3  0  0  5  2  0  5  4  4  7  2  6  2  3  5  5  0  7  0  1  5  7  7  1  7  1  6  7  3  5  2  6  7  7  7  2  5  7  4  3  0  6  3  1  3  7  0  1  7  5  2  4  6  3  5  6  4
 0  0  0  0  2  2  2  2  0  2  2  0  4  2  0  2  4  4  4  2  2  2  2  4  6  4  6  0  6  6  6  6  6  6  4  6  0  2  4  0  2  0  6  0  6  2  0  4  6  4  0  0  0  2  0  4  4  0  2  6  6  0  2  6  4  6  2  0  0  4  0  2  2  6  4  6  6  0  0  4
 0  0  0  0  0  4  4  0  4  4  0  4  0  0  4  4  0  4  4  0  0  4  0  4  4  0  4  0  4  4  0  0  4  4  4  0  4  0  4  4  4  0  0  0  4  4  4  0  0  0  0  4  0  0  0  0  4  0  4  0  0  0  4  0  4  4  0  0  0  4  4  0  4  0  4  4  4  4  4  4

generates a code of length 80 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+124x^70+508x^71+646x^72+1130x^73+1279x^74+2096x^75+1806x^76+2516x^77+2151x^78+3118x^79+2338x^80+2914x^81+2404x^82+2598x^83+1679x^84+1870x^85+1054x^86+1080x^87+515x^88+412x^89+223x^90+114x^91+83x^92+54x^93+25x^94+20x^95+4x^96+2x^98+2x^102+2x^103

The gray image is a code over GF(2) with n=320, k=15 and d=140.
This code was found by Heurico 1.16 in 44.1 seconds.